Earlier this week, it held an annual event for a small group of journalists inside its home of the future, recently remodeled to include more examples of what workplaces of the future might look like. One technology Microsoft returned to again and again in its demonstrations was jumbo-size touchscreens, which are based on designs by Perceptive Pixel, a company Microsoft acquired last year. Perceptive Pixel’s screens, which look like the offspring of an iPad and a television set, are most familiar to people who have watched election night coverage on networks like CNN, where on-air commentators have for years manipulated electoral maps using the technology.